particle's moves in a straight line, whose velocity can be modelled by the
following function
v(t) = tsin(t):
Find the distance s, covered by the particle from time t = 0 to t = 2 pie. Sketch
the graph for v(t) over the domain [0, 2 pie], and display what the value of s
represents on your sketch. Hint: recall s(t) = v(t), also think about the sign
of the function v(t) for t > pie.